高疏水染料结构对超高分子量聚乙烯纤维染色性能的影响

doi:10.13475/j.fzxb.20190800606

摘要/Abstract

摘要：

为解决超高分子量聚乙烯(UHMWPE)纤维难以上染的问题,筛选出结构平面性良好的高疏水染料对UHMWPE纤维进行染色。通过染色后纤维K/S值、染料与纤维的亲和力、分配系数、染色热和染色熵等热力学参数的测定,研究了高疏水染料结构中疏水基团数目及其链长、硝基等强极性基团对纤维染色性能的影响规律,并分析了染料溶解度参数对其与纤维染色性能之间的相关性。结果表明:高疏水染料对UHMWPE纤维染色可获得高表观深度;染料的疏水性及其溶解度参数是影响其对UHMWPE纤维染色性能的重要因素;就染料母体结构而言,偶氮结构较蒽醌结构对UHMWPE纤维易于获得良好的染色性能。

关键词: 超高分子量聚乙烯纤维, 高疏水染料, 染色热力学, 吸附等温线

Abstract:

In order to solve the dyeing problem of ultrahigh molecular weight polyethylene (UHMWPE) fibers, the dyes with extreme hydrophobicity and good planarity were selected. The influence of dye structure on dyeing properties of UHMWPE fibers was studied by the determination of the K/S value of dyed fibers and the thermodynamic parameters such as the affinity, the partition coefficient, enthalpy change and entropy change between dyes and fibers. The number and chain length of hydrophobic groups, the polar groups such as nitro group and solubility parameter of hydrophobic dyes were analyzed. The results show that extreme hydrophobic dyes have satisfactory color depth on UHMWPE fibers. The hydrophobicity and solubility parameter of dyes are important factors affecting the dyeing properties of UHMWPE fiber. Azo-structured dyes are easier to obtain better dyeing performance for UHMWPE fiber than anthraquinone-structured dyes.

Key words: ultrahigh molecular weight polyethylene fiber, extreme hydrophobic dye, dyeing thermodynamics, adsorption isotherm

中图分类号:

TQ624

王晓春, 张健飞, 张丽平, 王娜娜, 闫金龙, 赵国樑. 高疏水染料结构对超高分子量聚乙烯纤维染色性能的影响[J]. 纺织学报, 2020, 41(03): 78-83.

WANG Xiaochun, ZHANG Jianfei, ZHANG Liping, WANG Nana, YAN Jinlong, ZHAO Guoliang. Influence of extreme hydrophobic dye structure on dyeing properties of ultrahigh molecular weight polyethylene fibers[J]. Journal of Textile Research, 2020, 41(03): 78-83.

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染料	K/S值	耐摩擦牢度/级
染料	K/S值	干	湿
乙基黄	11.6	4~5	4~5
苏丹蓝Ⅱ	4.0	3	3~4
油红O	13.7	3	3~4
分散红1	0.7	2~3	3
分散蓝291	0.9	2	2~3
分散橙25	0.4	2~3	2~3

序号	染料	K/S值	分配系数K	-Δμ⁰/ (kJ·mol^-1)	偶极矩/ D	摩尔体积/ (cm³·mol^-1)
1	乙基黄	11.6	5.35	-5.55	4.124 7	179.935
2	苏丹黄Ⅰ	4.8	9.56	-7.47	2.013 1	168.467
3	苏丹红G	3.4	6.22	-6.05	2.276 6	205.009
4	苏丹红Ⅲ	3.1	16.35	-9.25	2.498 9	278.365
5	苏丹红Ⅳ	5.3	17.73	-9.51	3.112 6	243.503
6	苏丹红B	10.2	29.26	-11.17	1.824 3	264.291
7	油红O	13.7	107.50	-15.48	2.920 2	290.521
8	蒽醌蓝	0.9	2.16	-2.55	3.039 7	184.899
9	苏丹蓝Ⅱ	4.0	22.46	-10.30	3.163 6	304.766
10	分散橙25	0.4	0.93	-0.25	8.523 5	260.539

染料	分配系数K		-Δμ⁰/(kJ·mol^-1)		染色热 ΔH⁰/(kJ·mol^-1)	染色熵ΔS⁰/(kJ·mol^-1·K^-1)
染料	100 ℃	125 ℃	100 ℃	125 ℃	染色热 ΔH⁰/(kJ·mol^-1)	100 ℃	125 ℃
乙基黄	3.55	5.35	-4.19	-5.55	-27.10	-0.09	-0.08
蒽醌蓝	0.62	2.16	-1.56	-2.55	-34.36	-0.10	-0.09
苏丹蓝Ⅱ	10.17	22.46	-7.68	-10.30	-87.61	-0.26	-0.25
苏丹红Ⅲ	9.32	16.35	-7.39	-9.25	-60.15	-0.19	-0.17
苏丹红Ⅳ	9.64	17.13	-7.50	-9.51	-65.57	-0.20	-0.19
苏丹红B	8.28	29.26	-6.99	-11.17	-144.64	-0.42	-0.39
油红O	28.24	107.50	-11.05	-15.48	-149.49	-0.44	-0.41

序号	染料	溶解度参数	K/S值
1	乙基黄	8.24	11.6
2	苏丹黄	8.57	4.8
3	苏丹红Ⅲ	8.43	3.1
4	苏丹红Ⅳ	8.52	5.3
5	苏丹红B	8.51	10.2
6	油红O	8.54	13.7
7	蒽醌蓝	9.94	0.9
8	苏丹蓝Ⅱ	9.43	4.0
9	分散红1	9.76	0.7
10	分散蓝291	10.89	0.9
11	分散橙25	9.88	0.4